Machine for making pile driver pads



Oct. 14, 1958 A. RpSABELLlCO 2,855,973

MACHINE FORMAKING PILE DRIVER PADS Filed Dec. 6, 1957 INVENTOR. ANT/ UAW7f. 5HEfL/CU BY O. 522% paler-16539126 United States Patent MACHINE FORMAKING PILE DRIVER PADS Anthony R. Sabellico, New Haven, Conn.

Application December 6, 1957, Serial No. 701,245

3 Claims. (Cl. 153-64) This invention relates to improvements in piledriver pads, and particularly to a machine for making pile driver pads.

It is known in the art that, when driving concrete piles into the groundby means of a pile driver, it is necessary to interpose a resilient padbetween the top of the pile and the hammer of the pile driver to takethe impact and thereby protect the end of the pile from disintegration.One of the customary methods of making such resilient pads is to cut asteel cable into short lengths, equal or less than the diameter of thepile, and form a layer of these pieces, preferably joining adjacentpieces of cable by welded spots, then, repeating this process untilseveral layers are formed, one above the other, the cable pieces of theadjacent layers being displaced at 90 degrees.

One of the important objects of my invention is to provide a resilientpile driver pad coiled from steel cable which has a longer life andwhich can be manufactured at a lower cost than the pile driver pads ofthe prior art.

Another important object of my invention is to provide a machine whichmakes it possible to manufacture such resilient pads coiled from steelcable, or from cable made of other suitable material, speedily,conveniently, and very economically.

Other objects and advantages of my invention will be apparent during thecourse of the following description.

In the accompanying drawing, forming a part of the present application,wherein for the purpose of illustration is shown a preferred form of myinvention,

Figure 1 is a frontal elevational view of my machine,

Figure 2 is a partly sectional view of the same through the line 2-2 ofFigure 1, showing also a partly completed coiled pad,

Figure 3 is a vertical sectional view of the same, with the tubularshaft in the raised position,

Figure 4 is a plan view of the coiled pad.

Referring to the drawing, the numeral 1 designates the base plate, whichin the preferred form is rectangular in shape. This base plate has acentral hole 2 and a circular guard 3, concentrically arranged. Securedto the base plate 1 are three legs 4, carrying the bearing 5, the boreof which is in alignment with the central hole 2. The circular guard 3is interrupted in the front, as shown in Fig. 2.

Rotatably mounted in the bearing 5 and central hole 2 is the tubularshaft 6, the upper end of which is secured to a crank 7, and the lowerend of which is provided with a slot 8. Secured to this tubular shaft 6,just above the slot, are the radial arms 9, which extend within a smallclearance to the inner surface of the circular guard 3. Adjacent to thebearing 5 the tubular shaft 6 has a hole 10 containing a removable pin11; in Fig. l the hole 10 and pin 11 are located adjacent to the lowerend of the bearing 5, whereas in Fig. 3 by the axial shifting of thetubular shaft 6 the hole 10 and pin 11 are moved to the upper end of thebearing 5, thereby defining the two positions of the tubular shaft 6:the lower or normal position (and the upper or discharge position.

2,855,973 Patented pct. lfl, 1958 "ice An essential element of themachine is the'knock out-rod 12' located within the tubular shaft 6, asshown in Fig. 3. The upper end of this knock out'rod 12 extends'abovethe upper end of the tubular shaft 6, and is provided with a detachablecap 13, and a spring 14 interposed between the cap 13 and the upper endof the tubular shaft 6 to hold the knock out rod in position. When thussupported by the spring 14, the knock out rod 12 will have its lower endjust slightly above the top of the slot 8 (see Fig. 3). When, however,downward pressure is applied on the cap 13 the knock out rod 12 willslide downwardly within the tubular shaft 6 forcing out any objectlocated in the slot 8.

The operation of my machine is as follows:

Before starting the coiling of the pad the machine is properly anchored,preferably by bolts or screws passing through the anchoring holes 15 ofthe base plate 1. Then, the tubular shaft 6 is lowered into the normalposition, shown in Fig. l, and is locked in this position by insertingthe pin 11 into the hole 10 located at the lower end of the bearing 5.

Following this, the end of the cable 16 is inserted into the slot 8 andthe tubular shaft is rotated by means of the crank 7, feeding in thecable through the frontal gap of the circular guard 3 (see Fig. 2).During this operation the coil of cable is kept within the circularguard 3 in a single layer by the radial arms 9 rotating with the shaft6.

After the required length of cable has been fed in and the coil istightly wound, the adjacent turns of the coil are secured to each otherby welding at several points located between the radial arms 9. Then,the tubular shaft 6, together with the welded coil is raised into theposition shown in Fig. 3 after the removal of the pin 11, and the shaft6 is locked in this upper position by the insertion of the pin 11 intothe hole 10 at the upper end of the bearing 5. Finally, downwardpressure is applied on the cap 13 causing the knock out rod 12 to slidedownwardly, against the spring pressure, forcing out the cable end fromthe slot 8 and thereby discharging the completed coil.

As the resilient pile driver pads usually made up of several of thesecoils placed one above the other, the above described operation will berepeated until the required number of coils are obtained.

It is to be understood that the form of my invention herein shown anddescribed is only a preferred example of the same, and that variouschanges in the shape, size, and in the arrangement of the parts may beresorted to without departing from the spirit of my invention or thescope of the subjoined parts.

I claim:

1. A machine for making spiral pads of cable for use on the top of apile to take the impact of the pile driver, comprising a base platehaving a central hole and a concentric circular guard; a bearing alignedwith said central hole and supported by legs secured to said base plate;a tubular shaft rotatable and sidable in said bearing and central hole,and having a slot at its lower end for receiving and engaging the end ofa cable; said shaft having a hole enclosing a removable pin to securesaid shaft in two positions, said hole and pin being adjacent to thelower end of said bearing in the normal position of said shaft, andadjacent to the upper end of said bearing in the raised position of saidshaft; means for rotating said shaft to form a spiral coil of saidcable; radial arms secured to said shaft and being so located that inthe normal position of said shaft said arms will confine said spiralcoil of cable within said circular guard and in a single layer; a knockout rod slidably mounted within 3 said tubular shaft and being adaptedto force out the end of said cable from said slot of the shaft when saidrod is moved downward within said tubular shaft. 2. The machine of claim1 in which said knock out rod is supported by a spring resisting thedownward movement 5 .cable.

of said rod and making it necessary to overcome the pressure of saidspring to move said knock out rod downwardly.

3. The machine of claim 1 in which said circular guard is interruptedfor the convenient feeding in of said No references cited.

